first·ling /ˈfɝstlɪŋ/
  首批東西,初生物
  First·ling n.
  1. The first produce or offspring; -- said of animals, especially domestic animals; as, the firstlings of his flock.
  2. The thing first thought or done.
  The very firstlings of my heart shall be
  The firstlings of my hand.   --Shak.
  First·ling, a. Firstborn.
     All the firstling males.   --Deut. xv. 19.
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